Pinpoint Test P: Temperature Control is Inoperative/Does Not Operate Correctly - EMTC
Climate Control System
Pinpoint Test P: Temperature Control is Inoperative/Does Not Operate Correctly - EMTC
Refer to Wiring Diagram Set 54, Manual Climate Control System for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, to rotate the temperature blend door actuator clockwise, the HVAC module supplies voltage to the temperature blend door actuator motors through the door actuator feed A circuit, and supplies ground through the door actuator feed B circuit. To rotate the temperature blend door actuator counterclockwise, the HVAC module reverses the voltage and ground circuits.
The temperature blend door actuator feedback resistor are supplied a ground from the HVAC module by the temperature blend door actuator return circuit and a 5-volt reference voltage on the temperature blend door actuator reference circuit. The HVAC module reads the voltage on the temperature blend door actuator feedback circuit to determine the temperature blend door actuator position by the position of the actuator feedback resistor wiper arm.
Door actuator feed A circuit
- LH blend - CH238 (YE/OG)
Door actuator feed B circuit
- LH blend - CH239 (BU/WH)
Door actuator return circuit
- LH blend - RH111 (GY/BU)
Door actuator reference circuit
- LH blend - LH111 (BN/WH)
Door actuator feedback circuit
- LH blend - VH440 (BU/BN)
B11E5:11-B1081:12:
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Temperature blend door actuator
- HVAC module
- Stuck or bound linkage or door
PINPOINT TEST P: TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - EMTC
P1-P3:
P3-P4:
P4-P6:
P6-P8:
P8-P11:
